BARCON LHC/PPC
Operation of devices with HART
®
communication
Subject to reasonable modifications due to technical advances.
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Calibration without pressure, zero point
Setting the zero point:
• Input of the pressure value within the pressure range of the sensor (nominal
pressure range)
Setting the measuring range (span):
• Input of a span value within the pressure range of the sensor (nominal pressure
range)
Sensor pressure range
Display of the sensor pressure range
When calibrating with pressure, a pressure value within the nominal
pressure range of the sensor is set for the zero point or span end point
and assigned to the associated output current signal. If the pressure lies
outside the nominal pressure range of the sensor, a fault signal results.
The value is then not saved.
A change in the zero point has no effect on the set span. However, if
due to a change in the zero point, the span end point represents a value
in excess of highest value of the nominal pressure range of the sensor,
the span end point remains at this highest value and the span is
correspondingly reduced. A change in the span setting has no effect on
the zero point.
When calibrating with pressure (wet calibration), the mounting
correction can be dispensed with, but this must be carried out before
the zero point and span point are saved.
When calibrating without pressure (dry calibration), a sensor mounting
correction should be carried out before or after the calibration (see also
section 9.2.7). For this, the sensor must be placed at the reference
position for the measurement (mounting position) and must not be
under pressure.
Important
Important
